Lipid Profile Change after Thyroidectomy
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Purpose: Thyroid diseases and lipid metabolic abnormalities have been reported to be correlated. In patients with thyroid cancer, thyroid stimulating hormone levels are suppressed to prevent recurrence. Many studies have reported dyslipidemia associated with thyroid function, although its extent before and after thyroidectomy remains to be studied. This study aimed to determine the lipid levels for administering accurate lipid treatment in thyroid cancer patients post thyroidectomy. Methods: In total, 1,203 patients with thyroid cancer who underwent thyroidectomy between June 1, 2016 and December 31, 2016 at the Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University, were enrolled in the study. Of these, patients aged <19 years and taking medication for dyslipidemia were excluded. Finally, we enrolled 295 thyroid cancer patients who underwent thyroidectomy and whose lipid profiles were confirmed pre- and post-operatively. Results: The total cholesterol levels in the lobectomy group without levothyroxine supplementation were significantly increased 1 year after surgery than those before surgery (168.17±29.19 mg/dL vs. 182.50±34.03 mg/dL, P=0.003). Additionally, the triglyceride (TG) levels were significantly decreased in the lobectomy with levothyroxine supplementation and total thyroidectomy groups, whereas cholesterol and low-density lipoprotein-cholesterol (LDL-C) levels showed no significant change. No significant changes in the levels of cholesterol, LDL-C, and TG were observed in all the 3 groups. Conclusion: Extent of surgery and levothyroxine supplementation had an insignificant impact on the levels of cholesterol, LDL-C, TG, and high-density lipoprotein-cholesterol compared pre- and post-operatively.
Abstract
Purpose: Thyroid diseases and lipid metabolic abnormalities have been reported to be correlated. In patients with thyroid cancer, thyroid stimulating hormone levels are suppressed to prevent recurrence. Many studies have reported dyslipidemia associated with thyroid function, although its extent before and after thyroidectomy remains to be studied. This study aimed to determine the lipid levels for administering accurate lipid treatment in thyroid cancer patients post thyroidectomy. Methods: In total, 1,203 patients with thyroid cancer who underwent thyroidectomy between June 1, 2016 and December 31, 2016 at the Thyroid Cancer Center, Gangnam Severance Hospital, Yonsei University, were enrolled in the study. Of these, patients aged <19 years and taking medication for dyslipidemia were excluded. Finally, we enrolled 295 thyroid cancer patients who underwent thyroidectomy and whose lipid profiles were confirmed pre- and post-operatively. Results: The total cholesterol levels in the lobectomy group without levothyroxine supplementation were significantly increased 1 year after surgery than those before surgery (168.17±29.19 mg/dL vs. 182.50±34.03 mg/dL, P=0.003). Additionally, the triglyceride (TG) levels were significantly decreased in the lobectomy with levothyroxine supplementation and total thyroidectomy groups, whereas cholesterol and low-density lipoprotein-cholesterol (LDL-C) levels showed no significant change. No significant changes in the levels of cholesterol, LDL-C, and TG were observed in all the 3 groups. Conclusion: Extent of surgery and levothyroxine supplementation had an insignificant impact on the levels of cholesterol, LDL-C, TG, and high-density lipoprotein-cholesterol compared pre- and post-operatively.
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